There are two main sources of light: natural and artificial.
Natural light sources include:
1. Sunlight: The sun is the primary source of natural light on Earth. It provides light and heat, and it is essential for life on Earth.
2. Fire: Fire is another natural source of light. It has been used for thousands of years for warmth, cooking, and light.
Artificial light sources include:
1. Incandescent bulbs: Incandescent bulbs are a type of electric light that produces light by heating a filament wire until it glows. They are commonly used in homes and offices.
2. Fluorescent bulbs: Fluorescent bulbs are another type of electric light that produces light by passing an electric current through a gas. They are commonly used in offices, schools, and other commercial buildings.
Other sources of artificial light include LED lights, neon lights, and halogen bulbs.
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Answer:
There are two main sources of light: natural and artificial.
Natural light sources include:
1. Sunlight: The sun is the primary source of natural light on Earth. It provides light and heat, and it is essential for life on Earth.
2. Fire: Fire is another natural source of light. It has been used for thousands of years for warmth, cooking, and light.
Artificial light sources include:
1. Incandescent bulbs: Incandescent bulbs are a type of electric light that produces light by heating a filament wire until it glows. They are commonly used in homes and offices.
2. Fluorescent bulbs: Fluorescent bulbs are another type of electric light that produces light by passing an electric current through a gas. They are commonly used in offices, schools, and other commercial buildings.
Other sources of artificial light include LED lights, neon lights, and halogen bulbs.